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Tự cân bằng nhá!
a,
\(HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\
Cl_2+Fe\rightarrow FeCl_3\\
FeCl_3+NaOH\rightarrow Fe\left(OH\right)_3+NaCl\\
NaCl+H_2SO_{4\left(dn\right)}\rightarrow Na_2SO_4+HCl\\
HCl+CuO\rightarrow CuCl_2+H_2O\\
CuCl_2+AgNO_3\rightarrow Cu\left(NO_3\right)_2+AgCl\)
b,
\(KMnO_4+HCl\rightarrow KCl+MnCl_2+Cl_2+H_2O\\ Cl_2+H_2\rightarrow HCl\\ HCl+Fe\left(OH\right)_3\rightarrow FeCl_3+H_2O\\ FeCl_3+AgNO_3\rightarrow Fe\left(NO_3\right)_3+AgCl\\ AgCl-as,t^o->Ag+Cl_2\\ Cl_2+NaBr\rightarrow NaCl+Br_2\\ Br_2+NaI\rightarrow NaBr+I_2\)
c, Giống câu b 3 pt đầu
\(HCl+Fe\left(OH\right)_2\rightarrow FeCl_2+H_2O\\
FeCl_2+AgNO_3\rightarrow Fe\left(NO_3\right)_2+AgCl\\
AgCl-as,t^o->Ag+Cl_2\)
d,
\(HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\
Cl_2+Fe\rightarrow FeCl_3\\
FeCl_3+NaOH\rightarrow Fe\left(OH\right)_3+NaCl\\
Fe\left(OH\right)_3+H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+H_2O\)
e,
\(HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\
Cl_2+NaOH\rightarrow NaCl+NaClO+H_2O\\
NaCl+H_2SO_{4\left(dn\right)}\rightarrow Na_2SO_4+HCl\\
CuO+HCl\rightarrow CuCl_2+H_2O\\
CuCl_2+AgNO_3\rightarrow Cu\left(NO_3\right)_2+AgCl\\
AgCl-as,t^o->Ag+Cl_2\)
f,
\(MnO_2+HCl\rightarrow MnCl_2+Cl_2+H_2O\\ Cl_2+KOH-t^o->KClO_3+KCl+H_2O\\ KClO_3\rightarrow KCl+O_2\\ KCl+H_2SO_{4\left(dn\right)}\rightarrow K_2SO_4+HCl\\ HCl+MnO_2\rightarrow MnCl_2+Cl_2+H_2O\\ Ca\left(OH\right)_2+Cl_2\rightarrow CaCl_2+Ca\left(ClO\right)_2+H_2O\)
1/
MnO2+ 4HCl\(\rightarrow\) MnCl2+ Cl2+ 2H2O
Cl2+H2\(\xrightarrow[]{as}\) 2HCl
HCl+ NaOH\(\rightarrow\) NaCl+ H2O
2NaCl\(\xrightarrow[]{đpnc}\) 2Na+ Cl2
Cl2+ SO2+ 2H2O\(\rightarrow\) H2SO4+ 2HCl
H2SO4 đặc+ NaCltinh thể\(\xrightarrow[]{< 250\cdot C}\) NaHSO4+ HCl
4/
H2SO4 đặc+ NaCltinh thể\(\xrightarrow[]{< 250\cdot C}\) NaHSO4+ HCl
MnO2+ 4HCl\(\rightarrow\) MnCl2+ Cl2+ 2H2O
3Cl2+ 6KOHđặc\(\rightarrow\) KClO3+ 5KCl+ 3H2O
2KClO3\(\xrightarrow[MnO2]{to}\) 2KCl+ 3O2
2KCl\(\xrightarrow[]{đpnc}\) K+ Cl2
Cl2+ Ca(OH)2\(\xrightarrow[]{30\cdot C}\) CaOCl2+ H2O
1, \(MnO_2+4HCl\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
\(Cl_2+H_2\underrightarrow{as,t^o}2HCl\)
\(HCl+NaOH\rightarrow NaCl+H_2O\)
\(2NaCl+2H_2O\xrightarrow[cmn]{đpdd}2NaOH+Cl_2+H_2\)
\(4Cl_2+4H_2O+H_2S\rightarrow H_2SO_4+8HCl\)
\(H_2SO_4+NaCl\underrightarrow{>400^oC}Na_2SO_4+HCl\uparrow\)
2, \(2KMnO_4+18HCl\rightarrow2KCl+2MnCl_2+5Cl_2+8H_2O\)
\(3Cl_2+2Fe\underrightarrow{t^o}2FeCl_3\)
\(FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3\downarrow+3KCl\)
\(2KCl+2H_2O\xrightarrow[cmn]{đpdd}2KOH+Cl_2+H_2\)
3, \(4HCl+MnO_2\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
\(3Cl_2+2Fe\underrightarrow{t^o}2FeCl_3\)\(FeCl_3+3NaOH\rightarrow3NaCl+Fe\left(OH\right)_3\downarrow\)
\(2NaCl+H_2SO_4\underrightarrow{>400^oC}Na_2SO_4+2HCl\)
\(2HCl+Cu\left(OH\right)_2\rightarrow CuCl_2+2H_2O\)
\(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\downarrow\)
4, \(H_2SO_4+2NaCl\underrightarrow{>400^oC}Na_2SO_4+2HCl\uparrow\)
\(4HCl+MnO_2\underrightarrow{t^o}MnCl_2+Cl_2+2H_2O\)
\(3Cl_2+6KOH\underrightarrow{80-100^oC}5KCl+KClO_3+3H_2O\)
\(2KClO_3\underrightarrow{t^o}2KCl+3O_2\)
\(2KCl+2H_2O\xrightarrow[cmn]{đpdd}2KOH+Cl_2+H_2\)
\(Cl_2+Ca\left(OH\right)_2\underrightarrow{30^oC}CaOCl_2+H_2O\)
Bạn tham khảo nhé!
1,
| 4NH3 | + | 5O2 | → | 6H2O | + |
4NO |
2,
| 3CO | + | Fe2O3 | → | 2Fe | + | 3CO2 |
3,Cu+2H2SO4→2H2O+SO2+CuSO4
4,Fe+4HNO3→2H2O+NO+Fe(NO3)3
5,
| Al | + | 6HNO3 | → | 3H2O | + | 3NO2 | + | Al(NO3)3 |
6,4 Zn0 + 5 H2SO4 → 4 ZnSO4 + H2S + 4 H2O
7,4Mg + 10HNO3->4Mg(NO3)2 + NH4NO3 + 3H2O
8,2 KMnO4 + K2SO3 + 2 KOH → 2 K2MO2O4 + K2SO4 + H2O
9,2 KMnO4 + 10 FeSO4 + 8 H2SO4 → 2 Mn(SO4) + 5 Fe2(SO4)3 +K2SO4 + 8 H2O
\(SO_2+Br_2+2H_2O\rightarrow H_2SO_4+HBr\)
\(5SO_2+2KMnO_4+2H_2O\rightarrow2MnSO_4+2H_2SO_4+K_2SO_4\)
\(Na_2SO_4+H_2SO_4\rightarrow Na_2SO_4+SO_2+H_2O\)
\(Ca\left(OH\right)_2+SO\underrightarrow{^X}\)
\(4FeSO_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)
PTHH1: Nước brom bị nhạt màu
PTHH2: Dung dịch thuốc tím kalipenmaganat (KMnO4) nhạt màu dần.
PTHH3: Xuất hiện khí mùi hắc lưu huỳnh dioxit (SO2) làm sủi bọt khí.
PTHH5: Từ FeS2 có màu vàng chuyển sang Fe2O3 màu nâu đỏ
1) \(\overset{+2}{Fe}\overset{-1}{S_2}+\overset{0}{O_2}\rightarrow\overset{+3}{Fe_2}\overset{-2}{O_3}+\overset{+4}{S}\overset{-2}{O_2}\)
quá trình OXH :\(\overset{+2}{Fe}\overset{-1}{S_2}\rightarrow\overset{+3}{Fe}+\overset{+4}{2S}+11e|\times4\)
quá trình khử : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)
\(\Rightarrow4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)2) \(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(\overset{+5}{N}O_3\right)_3+\overset{+2}{N}\overset{-2}{O}+H_2O+H_2\overset{+6}{S}O_4\)
quá trình OXH : \(\overset{+2}{Fe}\overset{-2}{S}\rightarrow\overset{+3}{Fe}+\overset{+6}{S}+9e|\times1\)
quá trình khử : \(\overset{+5}{N}+3e\rightarrow\overset{+2}{N}|\times3\)
\(\Rightarrow FeS+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO+2H_2O+H_2SO_4\)
CÒN ĐỂ CHIỀU MK LM CHO NHA
2Na + Cl2 \(\underrightarrow{t}\) 2NaCl
2NaCl + 2H2O \(\underrightarrow{đpmn}\) 2NaOH + Cl2 + H2
Cl2 + 2NaBr ➝ 2NaCl + Br2
Br2 + 2NaI ➝ 2NaBr + I2
3I2 + 2Al \(\underrightarrow{t}\) 2AlI3
\(Cl_2\) + 2Na => 2NaCl (Điều kiện: nhiệt độ)
2NaCl + \(2H_2O\) => \(Cl_2\) + \(H_2\) + NaOH (Điều kiên: điện phân dung dịch có màng ngăn
\(Cl_2\) + 2NaBr => 2NaCl + \(Br_2\)
\(Br_2\) +2NaI => 2NaBr + \(I_2\)
3\(I_2\) + 2Al => 2\(AlI_3\) (Điều kiện: nhiệt độ, xúc tác: \(H_2O\))
a) \(N_2+O_2\rightarrow2NO\)
\(\begin{matrix}N^0\rightarrow N^{+2}+2e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times1\end{matrix}\)
b) \(C_2H_5OH+3O_2\rightarrow2CO_2+3H_2O\)
\(\begin{matrix}C^{-2}\rightarrow C^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)
c) \(CH_4+2O_2\rightarrow CO_2+2H_2O\)
\(\begin{matrix}C^{-4}\rightarrow C^{+4}+8e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times4\end{matrix}\)
d) \(2H_2S+3O_2\rightarrow2H_2O+2SO_2\)
\(\begin{matrix}S^{-2}\rightarrow S^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)
e) \(4NH_3+3O_2\rightarrow2N_2+6H_2O\)
\(\begin{matrix}N^{-3}\rightarrow N^0+3e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times2\\\times3\end{matrix}\)
a)N2+O2->2NO
b)C2H5OH+3O2->2CO2+3H2O
c)CH4+2O2->CO2+2H2O
d)H2S+3/2O2->H2O+SO2 / 2H2S+3O2->2H2O+2SO2
e)2NH3+3/2O2->N2+3H2O / 4NH3+3O2->2N2+6H2O
CHÚC BN HỌC TỐT :))))
1) As2S3 + H2O + KClO3 -> H3AsO4 + H2SO4 + KCl
Quá trình cho e:
As2S3\(\rightarrow\) 2As+ 5 + 3S+6 +28e x3
Quá trình nhận e:
Cl+5 +6e \(\rightarrow\) Cl+1 x14
3As2S3 +18 H2O + 14KClO3\(\rightarrow\) 6H3AsO4 + 9H2SO4 + 14KCl
2) CuFeS2 + Fe2(SO4)3 + O2 + H2O\(\rightarrow\) CuSO4 + FeSO4 +H2SO4
Câu này lỗi nhé không cân bằng được
3CuFeS2 + 8Fe2(SO4)3O2 + 8H2O = 3CuSO4 + 19FeSO4 + 8H2SO4
#copy =))
\(2NaOH+Cl_2\rightarrow NaCl+NaClO+H_2O\)
\(H_2S+4Br_2+4H_2O\rightarrow8HBr+H_2SO_4\)
\(NaCl+AgNO_3\rightarrow AgCl+NaNO_3\)
$2NaOH + Cl_2 \to NaCl + NaClO + H_2O$
$H_2S + 4Br_2 + 4H_2O \to 8HBr + H_2SO_4$
$NaCl + AgNO_3 \to AgCl + NaNO_3$